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<span style="color:#7a7c7d;">// from: https://en.wikipedia.org/w/index.php?title=YANG&amp;oldid=792171830#Example</span>
<span style="font-weight:bold;">module</span> example-sports {

  <span style="font-weight:bold;">namespace</span> <span style="color:#f44f4f;">&quot;http://example.com/example-sports&quot;</span>;
  <span style="font-weight:bold;">prefix</span> sports;

  <span style="font-weight:bold;">import</span> ietf-yang-types { <span style="font-weight:bold;">prefix</span> yang; }

  <span style="font-weight:bold;">typedef</span> season {
    <span style="font-weight:bold;">type</span> <span style="color:#2980b9;">string</span>;
    <span style="font-weight:bold;">description</span>
      <span style="color:#f44f4f;">&quot;The name of a sports season, including the type and the year, e.g,</span>
<span style="color:#f44f4f;">       'Champions League 2014/2015'.&quot;</span>;
  }

  <span style="font-weight:bold;">container</span> sports {
    <span style="font-weight:bold;">config</span> <span style="color:#27aeae;">true</span>;

    <span style="font-weight:bold;">list</span> person {
      <span style="font-weight:bold;">key</span> name;
      <span style="font-weight:bold;">leaf</span> name { <span style="font-weight:bold;">type</span> <span style="color:#2980b9;">string</span>; }
      <span style="font-weight:bold;">leaf</span> birthday { <span style="font-weight:bold;">type</span> yang:date-and-time; <span style="font-weight:bold;">mandatory</span> <span style="color:#27aeae;">true</span>; }
    }

    <span style="font-weight:bold;">list</span> team {
      <span style="font-weight:bold;">key</span> name;
      <span style="font-weight:bold;">leaf</span> name { <span style="font-weight:bold;">type</span> <span style="color:#2980b9;">string</span>; }
      <span style="font-weight:bold;">list</span> player {
        <span style="font-weight:bold;">key</span> <span style="color:#f44f4f;">&quot;name season&quot;</span>;
        <span style="font-weight:bold;">unique</span> number;
        <span style="font-weight:bold;">leaf</span> name { <span style="font-weight:bold;">type</span> <span style="color:#2980b9;">leafref</span> { <span style="font-weight:bold;">path</span> <span style="color:#f44f4f;">&quot;/sports/person/name&quot;</span>; }  }
        <span style="font-weight:bold;">leaf</span> season { <span style="font-weight:bold;">type</span> season; }
        <span style="font-weight:bold;">leaf</span> number { <span style="font-weight:bold;">type</span> <span style="color:#2980b9;">uint16</span>; <span style="font-weight:bold;">mandatory</span> <span style="color:#27aeae;">true</span>; }
        <span style="font-weight:bold;">leaf</span> scores { <span style="font-weight:bold;">type</span> <span style="color:#2980b9;">uint16</span>; <span style="font-weight:bold;">default</span> 0; }
      }
    }
  }
}
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